Indicating member



Otj 27, 1925 Y 1,558,895

P. KRElsEL.

INDICATINGyMEMBEP Fied may 12,I 1923 mvgNToR Paul Krelsel.

- BY Y WITNEssEs:

Patented Oct. `27, 1925.

UNITED STATES PATENT OFFICE.

PAUL KREISEL, F NEWARK, NEW JERSEY, ASSIGNOR TO WESTINGHOUSE ELECTRIC&`MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA..

INDICATING MEMBER.

Appiication mea May 12, 1923. serial No. 638,622.

To all lwhom t may cof/wem:

Be it known that I, PAUL Knnrsnr., a citizen of Germany, and a residentof Newark, in the county 'of yEsser: and lState of New Jersey, haveinvented a new and useful Improvement in Indicating Members, of whichthe following is a specification.

My invention relates to indicating meinbers and particularly to meansfor mounting target members on the ends of measuringinstrument pointers.v

One object of my invention is to provide a device of the above indicatedcharacter 1 that shall be simple and durable in construction, economicalto manufacture and e'ffective in its operation. f

Another object ofvmyinvention 1s to provide a measuring instrumentpointer and its target that shall be held'together by their co-operativerelation, independently of any other medium.

Another obj ect of my invention is to provide separate target pointermembers that may be easily assembled and effectively held in permanentoperative relation.

I-Ieretofore, it has been usual to construct instrument pointers fromflat sheet material having target portions Aintegral therewith. It hasalso been usual to cement or solder separate target members on the endsof the pointers.v However, the pointer of the first mentioned type isnot suited to all classes of instruments and the pointer of the lattertype is more or less expensive and inconvenient to assemble.

To facilitate the assembly and to economize the construction ofinstrument pointers, I propose to employ members that may be readilyassembled and, by a simple pressing action, may be effectively connectedtogether.

The device is particularly adapted for mounting on a novel type ofpointer fully set forth in co-pending application, Serial No. 615,866;filed Jan. 30, 1923, by P. Mac- Gahan and assigned to the yTestinghouseElectric & Manufacturing Company.

Figure 1 of the accompanying drawings is an assembled view of anindicating member or structure, for a measuring instrument, comprising apointer arm and a target member therefor, constructed and assembled inaccordance with my invention, Figure 2 is .an enlarged detail plan orelevational view of the target member of Fig. 1,

Fig. 3 is a side elevational view of a target member taken at rightanglesfto Fig. 2, and

Fig. 4t is a bottom plan view of the target member shown in Fig. 2.

The device comprises, in general, an instrument pointer or arm 1,` atarget member 2 for the outer end thereof, and a basev or balancevstructure 3, for the inner end of the pointer 1, having an opening 4therein for mounting the device on an instrumen shaft (not shown). f

As set forth in the above mentioned copending application, the pointeris preferably of tapered seamless tubular construction. Thisconstruction provides great strength and resistance against bending fora given weight.

The targetl member 2, preferably constructed of sheet aluminum or othersuitable Alight weight material, is formed, by a simple punchingprocess, to have raised portions 5 and 6 on one side thereof and adepressed portion 7 intermediate the portions 5 and 6. The portions 5, 6and 7 are of substantially U-shape in cross-section having an openingv 8between theportions 5 and 7 and an opening 9 between the portions 7 and6.A Since the portion 7 projects oppositely to the portions 5 and 6," asocket or opening 10' is provided for the reception of the outer end ofthe pointer 1. The raised portion 5 tapers to substantially the outerend of the target member 2 to reinforce the latter and to preventbending of the relatively delicate outer end thereof.

In assembling theV device, the pointerr member 1 is placed'in the socket`10, by inserting it through the openings 9 and 8, and the devicethereafter subjected to pressure normal to the plane of the targetmember 2. This operation moves the portion 6 and the inner end of theportion 5 inwardly on one side of the member 2 and moves the portion 7member 2 to effect a slight bend in that portion of the pointer betweenthe portions 5 and 6 of the target member. Thus, the target 2 and thepointer 1 are interlocked to prevent longitudinal withdrawal of thetarget member and, since they are pressed together in the plane of thetarget member,

inwardly from the other side of the are provided with flattened engagingsurfaces in that plane to prevent relative turning. rilhis constructionretains: .the target. member in proper position.

By my invention, a very simple indicating member is provided in which.the members thereof are prevented from separation and relativedisplacement, without the `aid of any other medium or element, such ascement and rivets. Further, a relatively' thin ,target disk, which isthereby light in Weight, is reinforced against bending` at itsineicating point.

All of theabove described features combine terender theideviceeconomical, dura-ble and effective to a high degree.

`KWhile I have shown land described aparticular form of my invention,-changes may bc effected therein without Ydeparting from the spiritA andscope thereon-asset forth :in theappended claims.

l' claimv as my invention:

l. Ain indicating device conlprising a pointer lmember and a targetmember embodying longitudinally-e111tending `side-byside rela-tedsections 'held against lateral separation `and adapted toprovide atransversely-extending portion on `each of s 'il inen'ibersuforco-operation with the trans' versely-eXte'nd-ingportion on the other topositively interlock the members against longitudinal relative movement.

'2. A imlicating device -coinprising a pointer memberand .a targetmember one of which has. adjacent longitmdinil-sections on oppositesides of .the Iother :and 'one ot which has an opening? between theadjacent erde of said sections through which a .portion et the othermember extends, saidf'porftien and sections vbeing adaptedA to=` providecooperating transversely-extending portions to positively interlock themembers lagainst lei'igitudinal relative movement.

3, )in indicating device `comprising a pointer and .a sheet-materialtargetembodying longitudinelly.-ali:ned, alternately raised anddepressed portions having end openings and co-operating -to constitutesubstantially a receiving socket -for then'pointer.

ft. 'An indicating device for a measuring va pointerhaving an endportion for insertion in said socket, the arrangement of parts operatingwfhengpressure is applied normal to the flat surface of the target, tobend the pointer between said raised; portions tozhold the target andpointer together.

5. An indicating Vdevice forca measuring instrumentcomprising a -xflatsheet-metal target having longitudinally taper aligned spaced raiset'lportions of substantially shape in cross-section on 'one.side v.thereofand a longitudinally .tapered depressed portion of similargcross=section extending longitudinal-ly between said portions totherewith constitute a ,tapered socket, and a pointer :having a' taperedenchportionfor longitudinal ywedging insertion in vsaid socket, theyarrangelnent ef parts I@peint-nag, when pressure :applied normal-totheflat surface of the target,'to bend the pointer between said raisedportionsto hold. the tarand pointer together and to prevent relativeturning thereof.

t, Au lindicating' device -con-rprising ya pointer and a sheet-materialtarget member having a pointed Iindicatingend.anda reinforcing lchannelporti-on .extend-ing inwardly vfrom-aposit-ion adjacente-to said endalongl the longitlnlinal axisthereefc'and termi nating in va Areceivingportion for said pointer. p

=7. 'An indicating vvdevice comprising a pointer and a sheet-materialtarget member having-a pointed indicatingend and an integrallreinforcing portion extending inward ly from' aposition acentto saidendalong the longitudinal axis thereof, .the `rinner portionofsaidreinforcing' portion cmistituting receiving means for saidpointer.

In ltestimony \\fl1e r,eof, I have hereunto subscribed my name thisseventh day of any, i923.

PAULKREISEL. l[11. 5.]

